putting array of class in self-created function

[ryukils]

How do i write down array of class inside another function

class xc
{
private:
    const char *username;
public:
    void setusername(const char *in)
    {
        username=in;
    }
    void showusername()
    {
        printf("%s",username);
    }
};
void showall(xc iclass)
{
    for(int i=0; i<10; i++)
    {
        iclass[i].showusername();
    }
}
int main()
{
    xc xclass[10];
    xclass[0].setusername("abcde");
    showall(xclass);
}

(bad english sorry i am asian)

[fluppe]

The "showall" fcn must have a reference to a xc-Object as input, the way it is written here.
I'd suggest you try with declaring

void showall(xc[10]  iclass)
{
    for(int i=0; i<10; i++)
    {
        iclass[i].showusername();
    }
}

And i'm not sure if works fine because the username is a reference to some memory and is not really added to the object.

However, "iclass[i]" means dereferencing and therefore "iclass" in this context must be a reference, which it is in your main-fcn, but not in your declaration of "showall".

[Kikiman]

First of all, there is an syntax error. Correct it :

void showall(xc iclass[])

Or:

void showall(xc *iclass)

Second, your member (username) is uninitialized. If you use it, your program will crash. You should initialize that member before using it.

class xc
{
   const char *username;
   public:
   xc()
   {
     username = NULL;
   }
};

Third, you should check the value "username" before printing it. Your program cannot print a "NULL" username.
Also, this is C++. You should use "std::cout" instead of "printf"

void showusername()
{
    if(username != NULL)
    std::cout << username;
    else
    std::cout << "Not set";
}

Finally, here is my code.

class xc
{
public:
    xc()
   { 
     username = NULL;
   }

    void setusername(const char *in)
    {
        username=in;
    }

    void showusername()
    {
	if(username != NULL)
		std::cout << username;
	else
		std::cout << "Not set";
    }
private : 
    const char *username;
};

void showall(xc iclass[])
{
    for(int i=0; i<10; i++)
    {
	std::cout << "User[" << i << "] : ";
        iclass[i].showusername();
	std::cout << std::endl;
    }
}

int main()
{
    xc xclass[10];
    xclass[0].setusername("abcde");
    showall(xclass);
    return 0;
}

[fluppe]

@Kikiman: Too sorry for that one, meant xc iclass[10] , not as above ....

[ryukils]

the code is works thank you